{ stdenv, fetchurl, pkgconfig, libmnl }:

stdenv.mkDerivation rec {
  name = "libnetfilter_cthelper-${version}";
  version = "1.0.0";

  src = fetchurl {
    url = "http://netfilter.org/projects/libnetfilter_cthelper/files/${name}.tar.bz2";
    sha256 = "07618e71c4d9a6b6b3dc1986540486ee310a9838ba754926c7d14a17d8fccf3d";
  };

  buildInputs = [ pkgconfig libmnl ];

  meta = {
    description = "Userspace library that provides the programming interface to the user-space connection tracking helper infrastructure.";
    longDescription = ''
      libnetfilter_cthelper is the userspace library that provides the programming interface
      to the user-space helper infrastructure available since Linux kernel 3.6. With this
      library, you register, configure, enable and disable user-space helpers. This library
      is used by conntrack-tools.
    '';
    homepage = http://www.netfilter.org/projects/libnetfilter_cthelper/;
    license = stdenv.lib.licenses.gpl2Plus;
    platforms = stdenv.lib.platforms.linux;
  };
}